Wiring entries

Required skill:

Capability to establish connections with terminals (crimping or soldering)

Workmanship

Chrome plated brass housing

Waterproof but not submersible

Working Theory

Whether you are looking for improved low-end torque, better speeding up or you just want to blow everybody off the line, this Mercedes 250 performance chip is your choice. Performance Oxygen Sensor Chip results noticeable changes in horsepower at the wheels. setup is easy, no special tools or skill required. Faster take off, more performance capability, torque, better throttle sensitivity and improved fuel efficiency. Gain 10% additional horsepower, 10% torque and get awesome acceleration. Magnum O2 sensor fuel management chip has dyno-bench-tested results for producing more pony for Mercedes 250. This chip takes off the barriers employed by the Electronic Control Module on the fuel map. By fooling exhaust gas oxygen sensor signal, Mercedes 250 Oxygen sensor performance chip gives additional output and noticeable torque throughout the RPM range without compromise of fuel economy.

You do not need to dismount and solder your Mercedes 250’s Electronic Control Unit since the signal of O2 sensor fuel management chip overrides the Engine management resulting in higher power, mid-range torque as well as improved speeding up. Enjoy the benefits of an aggressive engine, without miffing flat spots. Detailed instructions, perfect fit. No MIL light issue. This performance chip is vehicle specific according to the type and operating range of factory O2 sensor. O2 sensor performance chip does not work well with power control chip modules or any tuned-up / decatted exhaust which triggers the MIL light.

Internal combustion engines are designed for optimal performance level, but manufacturers dial the performance back for release to the general public and in order to comply with certain environment pollution regulations. This Mercedes 250 O2 sensor fuel management chip lets you squeal past the stock barrier due to rigorous emissions control. This chip helps you to unleash the high-pony potential that's waiting underneath your hood. Optimize your Engine computer settings and allow your Mercedes 250's engine to respond better. Get massive boost in horsepower and mid-range torque while you enjoy greater fuel efficiency.

Put an end to restrictive factory emission control settings with the power of a Magnum Mercedes 250 Performance Oxygen Sensor Chip. This power chip makes you enable to obtain more HP right in the palm of your hand. With the Performance O2 Sensor Chip undercarriage, you can override the stock air fuel sensor in a wink of any eye, without any harmful side-effect. Ditch the delayed engine response of your Mercedes 250 with our invention had been debuted yet in 2001. Whether you’re about to launch off the starting line or speed away from the stoplight, this high-powered performance part can attain your goals.

Packing List

1 x Oxygen Sensor Performance Chip

4 x Bullet Connector

1 x Hose clamp

2 x Zip Tie

4 x Heat Shrink Tubing

1 x Installation Instructions

Injected gasoline engines controlled by Electronic Control Unit have an oxygen sensor to measure the amount of oxygen contained in the exhaust gas. These sensors deliver to the ECU fluctuating voltages according to the actual oxygen consistence of the air fuel mixture. Oxygen sensors are used to reduce vehicle emissions, by ensuring that engines burn their fuel efficiently and cleanly. In modern vehicles, these sensors are attached to the engine's exhaust manifold to determine whether the mixture of air and gasoline lead into the engine is rich (too much fuel) or lean (too little fuel). Regarding engine performance factory economy- and emission oriented AFR is proved to be "lean". If we fool the oxygen sensor signal delivered the ECU we may effectively boost engine horsepower. Magnum Performance Oxygen Sensor chip is designed to fool fluctuating O2 sensor signal in order to modify the air fuel ratio. Integrated voltage range-monitor is incorporated to avoid "signal out of range" or "voltage below threshold" trouble codes. Dual exhaust with two post oxygen sensors requires 2 units. To avoid misconceptions, Magnum Oxygen Sensor Performance Chip is not resistor. Oxygen sensor voltage signal cannot be tweaked with a resistor.

Please read instructions before installation.

REQUIRED SKILL LEVEL: Do-It-Yourself Basic Skill Required

REQUIRED TOOLS: Basic Hand Tools Required

ESTIMATED TIME OF INSTALLATION: up to 30 Minutes

Installation is Do-It-Yourself. Setup and adjustment doesn’t require special talent of installer.

Our easy to follow, step-by-step instructions will guide you, how to install your performance chip in 30 minutes or less, if you are lil electronically inclined.

As a manufacturer for over 22 years we stand behind our product line with full Tech Support available via emails 7 days a week.

Our certified mechanics who are actively involved in racing and high performance tuning are eager to assist you.

See colors and functions of each wire in car wiring diagram or search for your color layout in charts below.

Plug into the oxygen sensor signal wire inline with red wires, by cutting the signal wire in two. (Hydrochloric acid recommended by soldering.)

Ground either black wire to engine frame, exhaust pipe or battery negative and cut off the other black wire.

Insulate the contacts with the heat shrink tubing.

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If more than one oxygen sensor fitted, chip plugs into the downstream oxygen sensor.

If more than one oxygen sensor fitted, chip plugs into the downstream oxygen sensor.

Dual exhaust with two post oxygen sensors requires 2 units.

Prior to setup make sure the oxygen sensor works flawless in full range. Slow or worn oxygen sensor may cause the chip work inefficiently with zero to minimum gains.

Claims correlate to factory condition engine. Defect or extensive wear and tear of related parts or systems as oxygen sensor, sparkplug, fuel filter, injectors, injection or ignition system can result in no or minimum effect. Please get the vehicle checked by a certified mechanic prior to installation to avoid undesired inefficiency.

This performance chip does not work in conjunction with any upgrade affects the fuel trim or triggers the check engine light.

notable acceleration boost

though no MIL light i was worried of, notable acceleration boost but the chip delivered less power than expected and i am on the fence it improved fuel milage or car avereges the same in mles per gallon

Install is absolutely worry free

i needed two chips due to true (removed) dual exhaust, they seem to work fine and thus far no MIL that i was afraid of. Super fast free shipping and unequivocally tech team made efforts to address their input to your specific needs. They are as persistant as skilled. Install is absolutely worry free. I'll recommend this chip to tow truck fellows without hesitation.

performance changes are noticeable

The chip was shipped out quick. It was also the best price that i found anywhere on the internet, and at local shops in town. I have had a good shopping experience buying from magnum, I have also purchased some performance intakes for my Tundra and had no problem waiting for those either. The chip does what it was claimed to however check engine light popped up on the other day. I contacted technical support and I was told this is normal once my exhaust is decatted. Now I contemplate to reinstall a cheap cat to check what's under the sun. The performance changes are noticeable but as far as I know horsepower cannot be maxed out until MIL light is turned on. There is a restriction of some sort implied by the computer. I have to knock off one star for that side effect. Will revise my review if MIL is gone.

No horsepower change at all

I bought this chip for my truck to try to squeeze a little more pep and more mileage out the truck. Installed fine, no problems. No horsepower change at all. Stock my mileage was and is again 18 miles per gallon. Tried to gas up with higher octane fuel, getting same result economy and performance wise. I was really looking to squeeze more power out the old girl, since I use it for work. I wouldn't recommend it. Techs seemed to be prudent when supporting my issue but it still has not been solved.

product works and does what it is claimed t

I was under the false assumption that e-commerce companies conduct their job along the lines of business interest. I got my gas saver module in a few days and faced trouble when I went to install it. Contacted tech team and reply was instantaneous bearing resemblance to professionals. Undescribably unparalleled communication, extremely helpful tech's. No qualms, product works and does what it is claimed to. I will recommend this product to everyone and I'm about to sign up as a reseller.

19 of 19 people found this review helpful.

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this miniature chip has done what it said

i have an Suburban 5.7L that doesn't get the best fuel mileage and was a bit sluggish uphill. so over the year i find new ways to get better fuel mileage and this miniature chip has done what it said. plus if you want more power oxygen sensor performance chip will do the trick.

gives you a noticeable amount of horsepower and torque

I have been disbeliever ever since I bought a resistor chip that fried my mass air flow sensor. This chips is amazing though. It actually gives you a noticeable amount of horsepower and torque. I recommend this product to anyone looking to get the power they want out of their truck.

Unleash the max performance potential of your vehicle and say goodbye to lean factory fuel programming with this adjustable fuel controller. Your performance chip tunes your engine with advanced fuel programming to harness your engine’s full power. The fuel tuner will add 15 % extra horsepower to your power plant without compromise of engine durability or reliability. Chip tricks signals being read by the ECU, resulting an adjustment to fuel curve, which is what causes increase in power, acceleration and throttle response across the RPM range.

Are you chasing after heaps extra horsepower? Augment the performance potential of your vehicle and say adios to lean factory fuel programming with this fuel controller. Extract race-inspired performance out of our performance chip box and save big bucks on fuel as a positive side-effect. If you decided to harness your vehicle’s full performance potential, get a heck of lot more power with this fuel tuner and remap the fuel trim in a blip.

With our ECU controller, your fuel maps receive an extensive recalibration that delivers horsepower and torque down to the wheels. The performance chip works to optimize the fuel trim for ultimate power and better fuel mileage. Smart Fuel Tuner fools engine sensor signals being read by the ECU, resulting in an adjustment to the fuel curve which causes the increase in power as well as improves acceleration and smoothes out throttle response through the RPM range.

The 250 is one of the highest quality version of the well-known Mercedes o2 sensor performance chips. It was designed as an exclusive variant of the former Mercedess. Sounds weird, but it is exactly as it was. Anyway, the 250 Car Truck SUV wins over fans with its reliability and an outstanding design. However, the years go by and the company keeps on releasing new generations of the 250 while the older versions become outdated in 6 months or so. To prevent this, magnumtuning.com offers you a collection of the Mercedes 250 o2 sensor performance chips. Should you be looking for extra mid range horsepower and fuel consumption or you just want to improve mid range horsepower and fuel consumption on your Car Truck SUV, you stumbled upon the right tuning store. Our expertised people make the difference. We go beyond simply accepting orders. Our highly trained staff has many years of tuning application expertise and will provide real world solutions that are tailor made for you for the need of your Car Truck SUV. Quite simply, our business philosophy is to provide the widest Car Truck SUV product range supported to the highest technical standards.

Mercedes 250

Mercedes Oxygen s are available to your Mercedes Car, Truck SUV and this 250 Oxygen Sensor Performance chip will provide you maximum control over your Mercedes engine. Be assured, you buy a genuine Oxygen -Sensor Mod Chip from the manufacturer at the lowest rate available on the net. All Magnum 250 upgrades are covered by factory warranty. One of the many benefits to a Mercedes Oxygen is that you can enhance the driving power and that means better acceleration and low end torque on your 250 Car, Truck SUV. Oxygen Sensor Performance chip simply installs to the factory oxygen sensor of your Mercedes 250 and modifies the signal of the O2 sensor, so definitely you can expect a more efficient condition from the driving power of your Car, Truck SUV. The following follow up came from Alec, Hello, thanks for quick delivery and discount price would purchase from again shortly. Thanks Chris!